Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Patent
1980-04-02
1986-03-18
Gluck, Richard E.
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
F04B 4312
Patent
active
045765561
ABSTRACT:
A roller pump in which one or more hoses is compressed against an arcuate stator bearing surface by a plurality of rollers carried by a rotating rotor. A shim is provided in generally opposing relation to the stator bearing surface to impart a hose compression offset force to the rotor. In this manner, the forces imparted to the rotor remain substantially constant throughout its rotation. In a preferred embodiment, a liner, which may be unitary with the shim, overlies the hoses to be compressed by the rotor to compensate for dimensional variations between the rotor rollers and for variations in the bearing surface and the hoses themselves. The thickness of the shim, at its region of greatest thickness, approximates the combined thickness of the hose, when fully compressed, and the compensating liner. Tabs are provided to extend from the shim to assist in maintaining the shim and liner in proper orientation relative to the hoses to be compressed.
REFERENCES:
patent: 2899906 (1959-08-01), Becher et al.
patent: 3249059 (1966-05-01), Renn
patent: 3591319 (1971-07-01), Shlisky
patent: 3723030 (1973-03-01), Delfand
patent: 4231668 (1980-11-01), Groth et al.
Carlson et al., New Low Power High-Reliability Infusion Pump, New England (Northeast), Bioengineering Conf., Troy, N.Y., 1979, Pergamon Press, pp. 193-196.
Gluck Richard E.
Medtronic Inc.
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